Type Geological formation Underlies New Harbour Group Country Wales | Unit of Holy Island Group Thickness Approx. 360 to >1000m Named for South Stack | |
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The South Stack Formation is a sequence of late Neoproterozoic metasedimentary rocks exposed in northwestern Anglesey, North Wales. The outcrop of this formation at South Stack was chosen as one of the top 100 geosites in the United Kingdom by the Geological Society of London, for its display of small-scale folding.
References
South Stack Formation Wikipedia(Text) CC BY-SA